Artificial tree



FIG. 1 is a top view of an artificial tree;

FIG. 2 is a bottom view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is one side view thereof;

FIG. 6 is the opposite side view thereof.

The ornamental design for an artificial tree, as shown and described.